#603399
Closest named color: Rebecca Purple (#663399). oklch(43.3% 0.159 300), rgb(96, 51, 153).
Aa
White text reads best on this color (8.63:1).
About this color
#603399 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.159 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.012 away. White text reads best on it, at 8.63:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #603399 |
| RGB | rgb(96, 51, 153) |
| HSL | hsl(266, 50%, 40%) |
| OKLCH | oklch(43.3% 0.159 300) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #603399 | 8.63:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #603399 | 2.43:1 | Fails | Lc 14.9 | Not readable |
| #603399 text on white | 8.63:1 | AAA | Lc 89.1 | Fine for body text |
| #603399 text on black | 2.43:1 | Fails | Lc -13.1 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#ECE6FA
oklch(93.6% 0.027 299.5)
-
Step 200
200
#DED2F7
oklch(88.5% 0.052 300.1)
-
Step 300
300
#CAB3F4
oklch(80.9% 0.093 300.5)
-
Step 400
400
#AF89EF
oklch(70.7% 0.149 299.8)
-
Step 500
500
#9D67E9
oklch(63.1% 0.19 300.2)
-
Step 600
600
#894AD7
oklch(55.6% 0.206 300.3)
-
Step 700
700
#743ABB
oklch(49.2% 0.192 299.9)
-
Step 800
800 (this color)
#603399
oklch(43.3% 0.159 300)
-
Step 900
900
#4D2D78
oklch(37.7% 0.124 300.2)
-
Step 950
950
#2D1B46
oklch(27% 0.078 300.6)
#603399 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #004B9C | 0.115 |
| Deuteranopia (no green cones) | #004B97 | 0.116 |
| Tritanopia (no blue cones) | #534A61 | 0.120 |
| Achromatopsia (no color) | #4C4C4C | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603399
#603399
oklch(43.3% 0.159 300)
- #4A5800
#4A5800
oklch(43.3% 0.103 119.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #603399, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.012
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.053
- Chrysanthemum #560BAD ΔE 0.067
- Grape #7209B7 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.078
- Bluey Purple #6241C7 ΔE 0.079
- Imperial Purple #480CA8 ΔE 0.081
Use #603399 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.